Rotary pump



Oct. 13, 1931.

J. F. JAWOROWSKI ROTARY PUMP Filed Dec.

3 Sheets-Sheet l gvwewtoz I Jase-PH r nuaRaws/c/ J. F. JAWOROWSKI ROTARY PUMP Oct. '13, 1931.

Filed Dec. 51, 1927 3 Sheets-Sheet 2 TIE-5' I AM Oct. 13, 193 1 J. F.. JAWOROWSKl Ronny PUMP Filed 1927 3 Sheets-Sh t 7 amoemtoz 1055p r- JHWURUNSK/ side plate bei removed. Fig. 5 is a sectional Patented Ot., 1' 3, 1931 UNITED STATES was PATENT" oF cs' JOSEPH I. J'AWOBOWBKI, CLEVELAND, OHIO, .ASSIG-IiI'OR,v BY DIRECT AND MESNE ASSIGNMENTS, OF TWO-NIN'I'HS T SAMUEL E. DEETTELBACH, ONE-TRIED TO SAM W. EMERSON, AND ONE-NINTH TO EDGAR ALL OF CLEVELAND, OHIO ROTARY PUMP My invention relates to rotary pumps, and my object in general is to provide a double acting ump of simple construction capable of pro ucing a uniform flow of liquid under constant pressure. Other objects are embodied in the details of construction substantially as hereinafter pointed out in the claims.

In the accompanying drawings, Fig. 1 is a side elevation of the pump, and Fig. 2 an end view thereof, Fig. 3 is a vertical section of the. ump on line 3-3 of Fig. 1. F g. 4 is a side e evatiofifof the body of the pump, one

view on horiz ntal lines 5-5 of Fig. 4. a Fig. 6 is a. horizontal section of the upper part of the pump on line 6-6 of Fig. 4. Fig. 7 is a vertical section on line 7-'-7 of Fig. 2. Fig. 8 is a part section and elevation on line 8-8 ofFig. 7 v

The pump comprises a main body 2 having a spreadingbase 3 to support the same in an upright position. The upper part of body 2 has an opening 4 extending entirely through Oppositely extending the same from front to rear, and the lower part of the body isof circular shape and pro vided'with, a pair of circular working chambers 5 and 6 in axial alignment but spaced apart by a central division wall 7 in body 2. bosses 8 and 9 on body 2 contain horizonta intake and discharge openings 10 and 11, respectively, which communicate with the top of both working chambers 5 and 6. A pan of reciprocable' blades or movable abutment members 12 and 13 are "confined within separate vertical slots or channels 14 and" 15, respectively, intermedi I ate the intake and outlet openings 10. and 11.

The upper end 16 of each abutment member 6 or blade is. channeled lengthwise and extends 4 into opening-.4 in body 2, while the lower end 17 of each abutment member or blade is re- .duced in width or thickness and extends into its correspondin working chamber. These J blades are held in constant working contact or engagement with a pair of rotatable piston or rotor membersv 18' and 19, respectively, which are keyed to a power shaft 20 having rotatable bearing in hubs 21 and 21' on the front and rear side plates 22 and 23, respec tively. Thepistons are circular and in the main eccentric to the axis of shaft 20 and the working chambers to provide crescentshaped workin' spaces which aredivided or separated-by t e abutment blades when projected thereinto. However, a large sector 24.

of each piston involving about ninety de- 1 ees of the circle is concentric with the axis so that it fits snugly the circular wall of the workin chamber within which it rotates. Prefera ly, the concentric engaging surface of each rotor is of such length as to fully cover both of the arc-shaped intake and outlet ports 25 and 26, respectively, when this part of the rotor is passlng said ports and the abut ment memberis raised to its maximum height. However, the intake and outlet ports 25 and 26 extend a short distance into the central wall of. body 2 and also above the circle of movement of the concentric part of the rotor so that when the abutment blade is raised to its maximum height a small area thereof will still remain exposed to the fluid openlngs especially when the rotor is still in a. posipress the blade constantly against the rotor.

Thus the area of the top endof' the blade is greater than the area exposed to the fluid at the lower end of-the blade, and as the fluid under pressure acts to press the blade sidewise in itsslot andseat, one side or seat is sealed and the other or pressure side'aifords a pressure may ass upwardly into the top opening above t e top edge of the blade. The fluid pressure on the upper end of the blade holds the blade in working engagement with the rotor under normal operating conditions, but it is also desirable t at a supplemental pressure be present on each blade, to facilitate slight space through which "the .fluid under 1 lopse play, and to efiect a balancin equaliznng movement between the pair oi" blades;

The two eccentric rotors or pistons are keyed to the shaftone-hundred and eighty degrees apart-nor in balance, thei eby promoting. a constant uniform flow oi? fluid from the pump, and the respective pistorrblades or abutment members are engaged at their upper ends by the rounded extremities of a pivoted equalizing member'or lever 29 which is springpressed. Thus the pivot pin 30 of lever 29 1s removably seated withinthe slotted or forked extremity of a short cylindrical plunger 31 operating in a vertical opening 32 centrally at the top of body 2; The upperend of opening 32 is sealed by a hollow cap or nut 33 containing a spiral compression spring 34' which extends downwardly into a socket 35 in the upper end of plunger 31. A. constant downward pressure is exerted by spring 3% upon equalizing lever 29 to hold the piston blades under control in starting the pump and at normal operating speeds, and obviously it wear takes place the spring compensates for such wear and avoids loose or idle play between the parts, the construction of the pump,

as described also permits convenient assembly and disassembly of the parts, 7

The opposite ends or the piston shaft are reduced in diameter and one end is longer than the other. The short end of the shaft extends into one boss or bearing on the side plate and the shaft opening is closed and sealed by nut 36. The longer end of the shaft extends through a ring packing 37 and pac ing gland 38, and a clamping bar 40 having lugs 4-1 projecting' into cross slots 42 in the gland, A. pair of bolts 43 secure the clamping bar to the hub of the side plate, The pair of side plates are secured tightly to the opposite sides of the body by tie bolts 4%. Removal of the side bolts permits the side plates to be detached from the body and then all the wormng parts therein are fully exposed and more readily removed and reassembled including the equalizing lever in the cross passage at the top of the body.

As constructed the pump is a reversible pump as well as a double-acting pump.

A vertically-inclined opening 45 is provided in thetop of the pump body, which opening communicates with the cross passage 4-2 and a screw plug 4:6 closes the entrance to said bore or opening. Upon removing the plug a pipe connection may be made with a source of steam or other fluid under pressure and which fluid is delivered into the cross passage and thence through the slots and into the working chamber to the outlet side' of the" pump and also to the inlet side when not under pressure or when open to the atneaaoee liquids, aint, silicon-soda, etc.

What claim, is; q

l. A double-acting rotary pump, comprising a body having apair of circular working chambers separated by a central division wall, said body also having an unobstructed cross passage at its top and vertical slots connecting said passage with said chambers, said body being further provided with separate inlet and outlet openings having ports communicating with said Working chambers adjacent the slots, said ports being elongated and open at one end to the bottom end of said slots, a pair of rotatable pistons eccentrically mounted within said circular chambers hava peripheral sector thereof of substantial length engaging the circular walls of said chambers, apair of piston blades slidably confined within said slots and engaging said pistons, an equalizing leverpivotally mounted within said cross passage and engaged at its v opposite ends with said blades; and a compression spring for said lever to force said pistonblades in self-adjusting contact with said pistons. i

2. A rotary pump, comprising a body having a pair ot circular working chambers, a I

cross passage at the top of said body, vertlcal slots connecting said'passage with-said chambers, separate inlet and outlet openings,

ton blades slidably confined within said slotsand engaging said pistons.

Tn testimony whereof Tafiix my signature.

JOSEPH F, JAWOROWSKT.

mosphere. The purpose of this arrangement is to permit the pp interior and the operating parts therein to be readily cleaned when 

